1. How Oxidation State Changes Between the Well, the Distribution Main and the Tap
Chromium Species Can Change Form
Hexavalent chromium, also known as chromium-6 or chromium(VI), may undergo chemical changes as water moves from its source through pipes to your tap. These changes can affect which chromium form is present, influencing water chemistry and treatment needs.
2. Why Aesthetic Secondary Standards Differ From Health-Based Limits, Applied to This Constituent
Chromium-6 Has No Federal Maximum Contaminant Level
Federal standards set a maximum contaminant level (MCL) for total chromium at 100 micrograms per litre (µg/L) or parts per billion (ppb), but no MCL exists specifically for chromium-6. Aesthetic guidelines relate to taste, color, and staining, and do not directly address health risks.
3. How Sample Depth, Well Depth or Source Type Changes What a Reader Should Expect
Sources Are Primarily Surface Water in This Region
The NJ American Water Co. - Coastal North system serving Monmouth and Ocean Counties relies on surface water sources. This influences typical chromium-6 levels detected during monitoring and may differ from groundwater well water profiles.
4. What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean
Chromium-6 Monitoring Data Shows Detections Within a Low Range
- 56 monitoring results recorded between 2013 and 2015.
- 31 results had chromium(VI) detected above the reporting level of 0.03 µg/L.
- The highest detected chromium-6 concentration was 0.53 µg/L.
- The median of detected values was 0.07 µg/L.
None of these results are above the federal MCL for total chromium. Detection does not indicate a violation or unsafe water. These measurements provide a trace-level indication for the entire public water system, not individual household water.
5. What a Certified Laboratory Test for This Constituent Reports and How to Read It
Lab Reports Detail Chromium-6 Concentration in µg/L (ppb)
A laboratory water test for chromium-6 will report concentrations in micrograms per litre, equal to parts per billion. The report lists the detected level or notes if the concentration is below the method reporting limit. Knowing the exact level requires such a test of your household water supply.
6. How Ion Exchange and Reverse Osmosis Differ in What They Do to Chromium(VI) Specifically
Chromium-6 Treatment Requires Specific Technology
Addressing chromium-6 in household water uses specialized technologies. The C-Series Chromium-6 Filter features equipment designed to configure and operate in home water systems to reduce chromium(VI) concentrations. It is a documented option for managing chromium-6 concerns but requires actual measurement of your water to confirm its suitability.
Closing: What You Should NOT Conclude From Area Data
Regional sampling data from the public water system record gives an overview of chromium-6 presence but does not establish your household's specific water quality or health risk. Detection above the reporting level does not imply exceedance of legal limits or unsafe conditions. To understand your home’s water, testing by a certified laboratory is necessary. The documented C-Series Chromium-6 Filter is a resource for water treatment once you determine your water’s chromium-6 levels.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-09-08. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for NJ American Water Co. - Coastal North (NJ1345001), NJ: 112 results across 2 listed contaminants, 52 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L